Test device, in particular for bottle-shaped containers as well

Measuring and testing – With fluid pressure – Leakage

Patent

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Details

73825, G01M 302

Patent

active

047683724

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The present invention relates to a test device, in particular for bottle-shaped containers, fashioned as a piston/cylinder assembly, as well as to a procedure for testing especially bottle-shaped containers consisting essentially of a synthetic resin.
During the course of continuously increasing efficiency, efforts are made to run certain events within ever shorter time periods in order to reduce overall costs and time in, for example, the packaging industry.
It has been found in this connection that, in the packaging industry, the performance of individual working steps entails not only spatial but also chronological overloads in that the transit time in, for example, the canning industry, from checking the empty container to checking after labeling, requires a long treatment path and a long treatment time.
The present invention has the object, along these lines, to simplify the existing conditions in such a way that, in particular, containers to be filled with liquid material which preferably consists in the majority of a synthetic resin can be tested before being filled with the material in order to quickly and unambiguously locate any rejects, for example, with respect to dimensioning, crushing resistance, leakproofness, and the like, prior to the filling procedure.
As is known, one strength of such containers particularly synthetic resin bottles, is determined with the aid of a compression device. Such testing machines, operating with spindle drives or simple pistons, are conventional. Thereafter, the leakproofness of the container is then tested, for example, in a further machine.
In this process, there is not only a need for two different devices or machines, but also for a corresponding time period for moving the test specimens and for conducting the corresponding test.
The present invention has the object of providing an improvement in this respect so that such tests are made simpler in every respect, i.e. with regard to space occupied, time requirement, need for machines.
The present testing device comprises several pistons in order to test several properties of the container with the container and cylinder remaining in the same position.
A corresponding procedure is distinguished in that the container and the test device are placed into the testing position and subsequently, leaving the two items in the testing position, several properties of the container are tested.
The invention will be described in detail below by way of example with reference to the accompanying drawings.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial cross-sectional schematic view of a testing installation for testing a crushing resistance and leakproofness of bottles manufactured from a synthetic resin; and
FIG. 2 is a partially schematic axial cross-sectional view, on an enlarged scale, of a test device as utilized in the testing installation of FIG. 1.


DETAILED DESCRIPTION

Referring now to the drawings when like reference numerals are used throughout the various views to designate like parts and, more particularly, to FIG. 1, according to this figure, a testing installation for testing bottle-shaped containers consisting of a synthetic resin according to the present invention includes a test specimen in the form of a bottle 4 disposed in a test yoke 3 arranged along a revolving or linearly moving feed line. The test specimen involves a simple bottle 4 with a bottleneck 5. A test device 7 is attached in the upper yoke arm 6 of the test yoke 3, with the test device 7 including a piston/cylinder assembly and being operated by compressed air. A compressedair connection 9 is provided with a pressure regulator 10 for regulating the air pressure required for determining the crushing resistance of the bottle 4. The compressed air, controlled in this manner, passes via a supply conduit 11 to a 3/2-way valve 13 which can be switched so that the adjoining conduit, containing a manometer 14, is either supplied with compressed air or, alternatively, in the position illustrated in FIG. 1, exh

REFERENCES:
patent: 3771649 (1973-11-01), Strauss
patent: 3777556 (1973-12-01), Zappia
patent: 3805594 (1974-04-01), Hayashi

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